DIPTI METAL INDUSTRIES
Butt Weld Stub Ends — Lap Joint Type A/B (Short & Long Pattern)
Precision-engineered Lap Joint Stub Ends for use with backing flanges, enabling repeatable assembly/disassembly and flange rotation. Manufactured in CS Butt Weld Stub Ends, SS Butt Weld Stub Ends, Alloy Butt Weld Stub Ends, Duplex Butt Weld Stub Ends & Nickel AlloysButt Weld Stub Ends for oil & gas, chemical, power, marine, water & desalination.
🏭 Dipti Metal: Your Global Source for Lap Joint Stub Ends
Stub Ends are paired with lap joint (loose/backing) flanges to permit easy alignment, rotation, and maintenance in piping systems. Dipti Metal supplies Type A (for lap joint flanges) and Type B configurations in both short pattern (MSS SP-43) and long pattern (ASME B16.9), with rigorous quality controls and full material traceability for projects in the Butt Weld Stub Ends in USA, Butt Weld Stub Ends in UK, Butt Weld Stub Ends in UAE, Butt Weld Stub Ends in Saudi Arabia, Butt Weld Stub Ends in Germany, Butt Weld Stub Ends in Singapore and worldwide.
We support standard and heavy-wall schedules with custom lap thickness, barrel length, and facing per drawing. Document packs include EN 10204 3.1/3.2 MTCs, optional TPI, and comprehensive NDT as specified.
🔧 Product Specifications & Technical Details
Dimensions & Sizes
- NPS: 1/2″ (DN15) to 48″ (DN1200); larger/custom on request
- Schedules: SCH 10, 20, 30, STD, 40, 60, XS, 80, 100, 120, 140, 160, XXS
- Patterns: Short pattern (MSS SP-43), Long pattern (ASME B16.9)
- Types: Type A (for lap joint flanges), Type B (per project/backing flange spec)
Standards & End Prep
- Dimensional: ASME B16.9 (long pattern); MSS SP-43 (short pattern)
- International: DIN / EN, JIS B2311/B2312, ISO equivalents
- Bevels: ASME B16.25 butt-weld ends (optimized weld prep)
- NDT: PMI, Hydro, RT/UT, LPT/MPT; QAP/ITP per project
Verify flange compatibility (lap radius/thickness and facing) against drawings and the governing standard. For sour/chloride services, specify material class and NACE/ISO requirements.
🧱 Butt Weld Stub Ends& Butt-Weld Pipe Fittings — Grades & International Equivalents
Butt-weld-only grades commonly used for stub ends. Confirm chemistry/mechanical properties with project specs. 3.1/3.2 MTCs with full heat traceability are available.
| Butt Weld Stub Ends Material Family | Butt Weld Stub Ends Grade / Alloy | Butt Weld Stub Ends UNS | EN / W.Nr. | Butt Weld Stub Ends ASTM / ASME | Butt Weld Stub Ends DIN / ISO / BS / GOST |
|---|---|---|---|---|---|
| Carbon Steel | ASTM A234 WPB | K03006 | — | ASTM A234 WPB / ASME SA234 | DIN 2609; BS 1640; GOST 17375 |
| ASTM A234 WPC | K03506 | — | ASTM A234 WPC / ASME SA234 | — | |
| ASTM A420 WPL6 / WPL3 (LTCS) | K03011 | — | ASTM A420 WPL6/WPL3 / ASME SA420 | DIN 17175; GOST 17375 | |
| Stainless Steel | ASTM A403 WP304 / 304L / 304H | S30400 / S30403 / S30409 | 1.4301 / 1.4307 | ASTM A403 / ASME SA403 | X5CrNi18-10 |
| ASTM A403 WP316 / 316L / 316Ti | S31600 / S31603 / S31635 | 1.4401 / 1.4404 / 1.4571 | ASTM A403 / ASME SA403 | X2CrNiMo17-12-2 | |
| ASTM A403 WP317 / 317L | S31700 / S31703 | 1.4449 / 1.4438 | ASTM A403 | — | |
| ASTM A403 WP321 / 321H | S32100 / S32109 | 1.4541 / 1.4878 | ASTM A403 | X6CrNiTi18-10 | |
| ASTM A403 WP347 / 347H | S34700 / S34709 | 1.4550 | ASTM A403 | X6CrNiNb18-10 | |
| ASTM A403 WP904L | N08904 | 1.4539 | ASTM A403 | X1NiCrMoCu25-20-5 | |
| Alloy Steel (Cr-Mo) | ASTM A234 WP1 | — | 1.5415 | ASTM A234 WP1 | 15Mo3 |
| ASTM A234 WP5 | — | 1.7362 | ASTM A234 WP5 | 5CrMo9 | |
| ASTM A234 WP9 | — | 1.7386 | ASTM A234 WP9 | X12CrMo9-1 | |
| ASTM A234 WP11 / WP22 | K11597 / K21590 | 1.7335 / 1.7380 | ASTM A234 | 13CrMo4-5 / 10CrMo9-10 | |
| ASTM A234 WP91 | K91560 | 1.4903 | ASTM A234 WP91 | X10CrMoVNb9-1 | |
| Duplex & Super Duplex | ASTM A815 S31803 / S32205 | S31803 / S32205 | 1.4462 | ASTM A815 / ASME SA815 | X2CrNiMoN22-5-3 |
| ASTM A815 S32750 / S32760 | S32750 / S32760 | 1.4410 / 1.4501 | ASTM A815 / ASME SA815 | X2CrNiMoCuWN25-7-4 | |
| Nickel Alloys | ASTM B366 Monel 400 | N04400 | 2.4360 | ASTM B366 N04400 | NiCu30Fe |
| ASTM B366 Inconel 600 | N06600 | 2.4816 | ASTM B366 N06600 | NiCr15Fe | |
| ASTM B366 Inconel 625 | N06625 | 2.4856 | ASTM B366 N06625 | NiCr22Mo9Nb | |
| ASTM B366 Incoloy 800 / 825 | N08800 / N08825 | 1.4876 / 2.4858 | ASTM B366 N08800/N08825 | NiCr21Mo | |
| ASTM B366 Hastelloy C-276 | N10276 | 2.4819 | ASTM B366 N10276 | NiMo16Cr15W | |
| ASTM B366 Alloy 20 | N08020 | 2.4660 | ASTM B366 N08020 | NiCr20CuMo |
For sour service, request NACE MR0175 / ISO 15156 compliance. Matching bolting and gaskets can be supplied as a package.
📦 Product Names by Grade
- Carbon Steel Stub Ends — ASTM A234 WPB / WPC; LTCS ASTM A420 WPL6 / WPL3
- Stainless Steel Stub Ends — ASTM A403 WP304/L/H, WP316/L/Ti, WP317L, WP321/H, WP347/H, WP904L
- Alloy Steel Stub Ends — ASTM A234 WP1 / WP5 / WP9 / WP11 / WP22 / WP91
- Duplex & Super Duplex Stub Ends — ASTM A815 S31803 / S32205 / S32750 / S32760
- Nickel Alloy Stub Ends — ASTM B366 Monel 400; Inconel 600/625; Incoloy 800/825; Hastelloy C-276; Alloy 20
🧪 Quality Assurance & Certifications
Stub ends are controlled through raw-material verification, forming, heat treatment, machining of lap/facing, and final inspection.
Certificates
EN 10204 3.1/3.2 MTCs; ISO 9001 QMS; NACE MR0175 (on request).
Testing
PMI, Hydro, RT/UT, LPT/MPT; hardness, tensile, impact as required.
TPI Options
SGS, BV, TÜV, LR, DNV and others; full QAP/ITP & export packing docs.
We validate dimensional accuracy, weldability, and lap surface integrity to ensure safe, long-term service.
🏗️ Industries We Serve
Oil & Gas
Allows flange rotation/alignment during assembly and maintenance.
Chemical & Petrochem
Corrosion-resistant materials for aggressive media.
Power & Energy
High-temp Cr-Mo grades for steam lines and headers.
Marine & Offshore
Duplex/SDSS & Ni alloys for chloride-rich service.
Water & Desalination
Easy alignment in large diameter assemblies.
OEM & EPC
Project docs, TPI, rapid global shipping.
🌍 Global Reach & Expertise
Markets We Serve for Butt Weld Stub Ends
- Middle East: UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain
- Europe: Germany, UK, Netherlands, France, Italy, Spain
- North America: USA, Canada
- Asia: India, Japan, South Korea, China, Singapore
- SE Asia & Oceania: Malaysia, Indonesia, Thailand, Vietnam, Australia
- Africa & South America: Nigeria, Egypt, South Africa; Brazil, Mexico, Argentina
Butt Weld Stub Ends Applications
- Frequent dismantling or flange orientation changes
- Large-diameter piping where rotation aids alignment
- Corrosive/sour media requiring special alloys
- Compact skids (short pattern helps save space)
Ready stock and responsive production ensure short lead times for both short and long pattern stub ends.
✅ Why Partner with Dipti Metal?
- Complete Range: Type A/B stub ends in short & long patterns across sizes/schedules.
- Certified Quality: ASME/ASTM/EN/DIN/JIS compliance with full documentation.
- Competitive Pricing: Value-driven offers for global projects.
- Export Capability: Secure packing, export docs, worldwide delivery.
- Reliable Stockist: Ready-to-ship inventory for urgent needs.
- Custom Fabrication: Lap thickness, barrel length, special bevels, coatings & markings.
- Customer-Centric: Technical assistance from inquiry to post-delivery.
⭐ Customer Reviews
EPC Contractor (Middle East)
“Type A laps were smooth and dimensionally accurate; flanges rotated freely for bolt alignment.”
Rating: ★★★★★
Fabrication Supervisor
“Short pattern helped in tight skids; weld prep uniform across heats.”
Rating: ★★★★☆
Average rating: 4.8/5 (31 reviews).
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